Toxins

Foreign objects

Disk batteries, or button cells, are often mistakenly ingested, particularly by children and the elderly. They may be mistaken for pills because of their size and shape, or they may be swallowed after being held in the mouth while the battery is being changed. Battery ingestion can cause medical problems including blocked airway, vomiting, irritability, persistent drooling, and rash (due to nickel metal allergy).[4]

Pica is an abnormal appetite for non-nutritive items or for food items in a form not normally eaten, such as flour. Coprophagia is the consumption of feces, a behavior common in some animals.